CN111391644A - Control method of plug-in hybrid power system - Google Patents

Control method of plug-in hybrid power system Download PDF

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Publication number
CN111391644A
CN111391644A CN202010319986.4A CN202010319986A CN111391644A CN 111391644 A CN111391644 A CN 111391644A CN 202010319986 A CN202010319986 A CN 202010319986A CN 111391644 A CN111391644 A CN 111391644A
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China
Prior art keywords
driving motor
engine
generator
power
battery pack
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CN202010319986.4A
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Chinese (zh)
Inventor
马世友
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Jiangsu Saleen Automotive Technology Co Ltd
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Jiangsu Saleen Automotive Technology Co Ltd
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Priority to CN202010319986.4A priority Critical patent/CN111391644A/en
Publication of CN111391644A publication Critical patent/CN111391644A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/28Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/40Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the assembly or relative disposition of components
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60KARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L7/00Electrodynamic brake systems for vehicles in general
    • B60L7/10Dynamic electric regenerative braking

Abstract

The invention relates to a control method of a plug-in hybrid power system, when the SOC value of a battery pack is higher than a first threshold value, if the vehicle speed is lower than or equal to a second threshold value, the battery pack provides power for a driving motor and enters a pure electric mode; if the vehicle speed is higher than a second threshold value, entering a hybrid mode; when the SOC value of the battery pack is lower than or equal to a first threshold value, if the power generation amount of the engine is smaller than the energy required by the driving of the automobile, entering a hybrid mode; if the power generation amount of the engine is larger than the energy required by the driving of the automobile, the engine mode is entered, and the engine generates excessive torque during braking to charge the battery pack by generating induced current. The invention has the following advantages: the generator is guaranteed to generate power in the optimal and most stable state in the efficient power generation interval, energy is transmitted to the driving motor in three modes, the front wheel is driven to rotate, the energy is released and stored at the driving motor, and the beneficial effects are achieved in the aspects of economy and dynamic performance.

Description

Control method of plug-in hybrid power system
The technical field is as follows:
the invention belongs to the field of automobile power, and particularly relates to a control method of a plug-in hybrid power system.
Background art:
at present, the pure electric automobile cannot solve the problems of long-term mileage, high battery cost and the like, the market acceptance is low under the condition of no government subsidy, and a hybrid electric automobile and an extended-range electric automobile appear at present aiming at the problem of long-term mileage. The hybrid electric vehicle has the working principle that a fuel engine is used for directly driving the vehicle, redundant energy is generated and stored, and the stored electric quantity can drive the vehicle to run through a driving motor when the vehicle runs at a low speed. However, the structure design needs to be additionally provided with a gearbox to realize the hybrid function. Because the gearbox comprises parts such as gearbox shell, jackshaft, reverse shaft, planetary gear, bearing, operating mechanism etc. and is bulky, and the structure is complicated, and manufacturing cost is high, is unfavorable for cost reduction and lightweight design theory of car.
For example, patent No. 201510164818.1 discloses a control method of a plug-in hybrid system, as shown in fig. 2, wherein the plug-in hybrid system includes an engine (10) and a gearbox (20) mounted on a first shaft (1), a motor (30) mounted on a second shaft (2), a differential mechanism and a power battery (60), the differential mechanism includes a gearbox and a differential (50), the power system must coaxially connect an input shaft (21) of the gearbox (20) and an output shaft (11) of the engine (10) when being arranged, and has certain limitation on cabin arrangement, the patent cancels the existing motor between the engine and the gearbox for realizing structural compactness, and uses the motor (30) of the second shaft (2) for realizing hybrid driving, so that the energy of the engine power system and the motor power system cannot realize effective coupling during power supply and conversion, it will cause a waste of engine energy.
Secondly, the engine (10) and the gearbox (20) which are arranged on the first shaft (1), and the motor (30) and the difference reducing mechanism which are arranged on the second shaft (2) form two independent modes for providing battery power, the two structures have large volumes and cannot be integrated, the energy of the whole power system cannot be effectively stored in the power providing and converting process, and when the energy is respectively transmitted to the gearbox (20) and the difference reducing mechanism, redundant energy is consumed.
For another example, patent No. 2017103742454 discloses an extended range hybrid system, as shown in fig. 3, in which an ISG motor (2) is arranged coaxially with an engine (3) and a generator. However, the economical oil consumption operation speed of the engine is generally 2000-3000rmp, the high-efficiency power generation speed of the generator is about 2-2.5 times of that of the engine, and when the generator is coaxially connected with the engine, the high-efficiency work interval of the generator under the condition of low oil consumption of the engine cannot be ensured, and the optimal power effect cannot be achieved.
Therefore, the existing plug-in hybrid power system and the extended range hybrid power system which are mixed strongly have defects in arrangement structure and energy transmission control method.
The invention content is as follows:
the invention aims to overcome the defects and provides a control method of a plug-in hybrid power system, which ensures that a generator generates power in an optimal and most stable state in a high-efficiency power generation interval, and under a pure electric mode, a hybrid mode and an engine mode, energy is transmitted to a driving motor and then drives a front wheel to rotate, and the energy is released at the driving motor, so that the control method has beneficial effects in the aspects of economy and dynamic property.
The purpose of the invention is realized by the following technical scheme: a control method of a plug-in hybrid power system comprises an engine, a battery pack, an oil tank and a driving transmission part, wherein the engine is communicated with the oil tank, the driving transmission part comprises a transmission shell, a generator, a driving motor and a differential mechanism, the generator, the driving motor and the differential mechanism are arranged in the transmission shell, the generator and the engine are connected in a non-coaxial mode through a pair of reduction gears, the generator is connected with the driving motor, the driving motor is connected with the differential mechanism through a pair of main reduction gears, the differential mechanism is connected with front wheels of an automobile through a driving shaft, and the battery pack is respectively connected with the generator and the driving motor;
the control method of the plug-in hybrid power system comprises
When the SOC value of the battery pack is higher than a first threshold value, if the vehicle speed is lower than or equal to a second threshold value, the battery pack provides power for the driving motor and enters a pure electric mode; if the vehicle speed is higher than the second threshold value, the engine is started, the engine transmits power to the generator, the generator and the battery pack provide power for the driving motor at the moment, and the hybrid mode is entered;
when the SOC value of the battery pack is lower than or equal to a first threshold value, if the power generation amount of the engine is smaller than the energy required by the driving of the automobile, the engine transmits power to the generator, the generator and the battery pack provide power for the driving motor together, and the hybrid mode is entered; if the generated energy of the engine is larger than the energy required by the driving of the automobile, the engine provides power to the generator, the generator provides power for the driving motor, the engine enters an engine mode, and the engine generates redundant electric quantity through the generator to charge the battery pack;
when the front wheel is in a braking state, the driving motor converts the braking mechanical energy into electric energy to charge the battery pack.
The invention is further improved in that: the pure electric mode specifically comprises the following steps,
the engine does not work, the battery pack transmits energy flow to the main reduction gear and the differential mechanism in sequence through the driving motor, and the differential mechanism drives the front wheels to rotate through the driving shaft.
The invention is further improved in that: the hybrid mode may specifically include the following modes,
the engine and the battery pack are both used for providing power for the driving motor, one part of power of the driving motor runs through the engine, energy flow sequentially passes through the reduction gear and the generator to the driving motor, the other part of power of the driving motor transmits an energy source to the driving motor through the battery pack, the driving motor sequentially transmits the obtained energy to the main reduction gear and the differential mechanism, and the differential mechanism drives the front wheel to rotate through the driving shaft.
The invention is further improved in that: the engine modes may specifically include the modes of operation,
the engine works, the battery pack does not work, power is transmitted to the driving motor from the engine sequentially through the reduction gear and the generator, and the driving motor transmits the power to the driving shaft sequentially through the main reduction gear and the differential to drive the front wheel to rotate.
The invention is further improved in that: the output end a of a crankshaft of the engine is connected with a reduction gear, the input end a of the generator is connected with another reduction gear, the pair of reduction gears are meshed with each other to realize transmission, and when the engine runs, power is transmitted to the generator through the output end a of the crankshaft and the input end a of the generator in sequence.
The invention is further improved in that: the output end b of the driving motor is connected with one main reduction gear, the input end b of the differential mechanism is connected with the other main reduction gear, the pair of main reduction gears are meshed with each other to realize transmission, the differential mechanism is connected with the front wheel of the automobile through a driving shaft, and power obtained by the driving motor sequentially passes through the output end b of the driving motor, the main reduction gear and the input end b of the differential mechanism to the driving shaft to finally drive the front wheel to rotate.
The invention is further improved in that: the generator is connected with the driving motor, the battery pack is connected with the generator, and the battery pack is connected with the driving motor through the electric control module.
The invention is further improved in that: the transmission shell is connected with the engine and then integrally arranged in the engine room of the automobile.
The invention is further improved in that: the generator, the driving motor and the differential are arranged in the upper space and the lower space.
Compared with the prior art, the invention has the following advantages:
1. the invention cancels the original gearbox, adds the generator and the driving motor, realizes the non-coaxial connection of the engine and the generator, ensures that the generator provides better power for the driving motor under the same rotating speed, ensures that the generator realizes the power generation under the optimal and most stable state in a high-efficiency power generation interval, simultaneously cancels the original gearbox with complex structure, and also obtains beneficial effects on compact structure and assembly.
2. The design enables the engine, the generator and the driving motor to be highly integrated in structure, the structural compactness is improved, energy is transmitted to the driving motor in a pure electric mode, a mixed mode and an engine mode, then the front wheel is driven to rotate, the energy is released at the driving motor, redundant energy is used for charging the battery pack, and the electric vehicle has beneficial effects in the aspects of economy and dynamic property; importantly, when the automobile is in a braking state, the driving motor converts braking mechanical energy into electric energy, and finally the battery pack is charged to achieve energy recovery.
Description of the drawings:
fig. 1 is a structural framework diagram of a control method of a plug-in hybrid power system according to the present invention.
Fig. 2 is a structural framework diagram of a conventional high-voltage plug-in hybrid system.
Fig. 3 is a structural frame diagram of a conventional extended range hybrid system.
Reference numbers in the figures: 1-engine, 2-reduction gear, 3-generator, 4-driving motor, 5-transmission shell, 6-differential, 7-driving shaft, 8-front wheel, 9-battery pack, 10-oil tank, 11-main reduction gear, 12-input end a, 14-output end b and 15-input end b.
The specific implementation mode is as follows:
for the purpose of enhancing the understanding of the present invention, the present invention will be further described in detail with reference to the following examples and the accompanying drawings, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
As shown in fig. 1, an embodiment of a control method of a plug-in hybrid power system according to the present invention is provided, the plug-in hybrid power system includes an engine 1, a battery pack 9, an oil tank 10 and a drive transmission component, the engine 1 is communicated with the oil tank 10, the drive transmission component includes a transmission housing 5, a generator 3 disposed in the transmission housing 5, a drive motor 4 and a differential 6, the generator 3 and the engine 1 are connected in a non-coaxial manner through a pair of reduction gears 2, the generator 3 is connected with the drive motor 4, the drive motor 4 is connected with the differential 6 through a pair of main reduction gears 11, the differential 6 is connected with a front wheel 8 of an automobile through a drive shaft 7, and the battery pack 9 is respectively connected with the generator 3 and the drive motor 4;
the control method of the plug-in hybrid power system comprises
When the battery SOC value of the battery pack 9 is higher than a first threshold value, if the vehicle speed is lower than or equal to a second threshold value, the battery pack 9 provides power for the driving motor 4 and enters a pure electric mode; if the vehicle speed is higher than the second threshold value, the engine is started, the engine 1 transmits power to the generator 3, the generator 3 and the battery pack 9 jointly provide power for the driving motor 4 at the moment, and the hybrid mode is entered;
when the SOC value of the battery pack 9 is lower than or equal to a first threshold value, if the power generation amount of the engine 1 is smaller than the energy required by the driving of the automobile, the engine 1 transmits power to the generator 3, the generator 3 and the battery pack 9 jointly provide power for the driving motor 4, and the hybrid mode is entered; if the power generation amount of the engine 1 is larger than the energy required by the driving of the automobile, the engine 1 provides power to the generator 3, the generator 3 provides power for the driving motor 4, the engine mode is entered, and the engine 1 generates redundant electric quantity through the generator 3 to charge the battery pack 9;
when the front wheel 8 is in a braking state, the driving motor 4 converts the braking mechanical energy into electric energy to charge the battery pack 9.
Specifically, the pure electric mode specifically includes,
when the engine 1 does not work, the battery pack 9 transmits energy flow to the main reduction gear 11 and the differential mechanism 6 through the driving motor 4, and the differential mechanism 6 drives the front wheels 8 to rotate through the driving shaft 7.
Specifically, the mixed mode specifically includes,
the engine 1 and the battery pack 9 are both used for providing power for the driving motor 4, part of power of the driving motor 4 runs through the engine 1, energy flow sequentially passes through the reduction gear 2 and the generator 3 to the driving motor 4, the other part of power of the driving motor 4 transmits an energy source to the driving motor 4 through the battery pack 9, the driving motor 4 transmits the obtained energy to the main reduction gear 11 and the differential mechanism 6, and the differential mechanism 6 drives the front wheel 8 to rotate through the driving shaft 7.
Specifically, the engine mode specifically includes,
the engine 1 works, the battery pack 9 does not work, power is transmitted to the driving motor 4 from the engine 1 sequentially through the reduction gear 2 and the generator 3, and the driving motor 4 transmits the power to the driving shaft 7 sequentially through the main reduction gear 11 and the differential mechanism 6 to drive the front wheel 8 to rotate.
The invention cancels the original gearbox, adds the generator 3 and the driving motor 4, realizes the non-coaxial connection of the engine 1 and the generator 3, ensures that the generator 3 provides better power for the driving motor 4 under the same rotating speed of the engine 1, ensures that the generator 3 realizes the power generation under the optimal and most stable state in a high-efficiency power generation interval, simultaneously cancels the gearbox with complex structure, and also obtains beneficial effects on compact structure and assembly.
The design enables the engine 1, the generator 3 and the driving motor 4 to be highly integrated in structure, the structural compactness is improved, energy is transmitted to the driving motor 4 in a pure electric mode, a mixed mode and an engine mode, then the front wheel 8 is driven to rotate, the energy is released at the driving motor 4, redundant energy is used for charging the battery pack 9, and the beneficial effects on the aspects of economy and dynamic property are achieved; importantly, when the automobile is in a braking state, the driving motor 4 converts braking mechanical energy into electric energy, the electric energy is charged to the battery pack 9, energy recovery is achieved, the utilization rate of energy is greatly improved in three modes, and waste of energy under any condition is avoided.
The first threshold is used for determining the SOC value of the battery pack 9, the second threshold is used for determining the vehicle speed, and the first threshold and the second threshold are freely set according to specific vehicle requirements.
The output end a12 of the crankshaft of the engine 1 is connected with one reduction gear 2, the input end a13 of the generator 3 is connected with the other reduction gear 2, the pair of reduction gears 2 are meshed with each other to realize transmission, and when the engine 1 runs, power passes through the output end a12 of the crankshaft and the input end a13 of the generator 3 to the generator 3 in sequence. The engine 1 and the generator 3 are arranged non-coaxially, in order to enable the engine 1 and the generator 3 to work in a high-efficiency interval, a pair of reduction gears 2 are added between the engine 1 and the generator 3, and the reduction ratio of the reduction gears 2 is set according to the high-efficiency interval rotating speed of different engines and generators.
An output end b14 of the driving motor 4 is connected with a main reduction gear 11, an input end b15 of the differential 6 is connected with another main reduction gear 11, a pair of main reduction gears 11 are meshed with each other to realize transmission, the differential 6 is connected with a front wheel 8 of an automobile through a driving shaft 7, and power obtained by the driving motor 4 sequentially passes through an output end b14 of the driving motor 4, the main reduction gear 11 and an input end b15 of the differential 6 to the driving shaft 7 to finally drive the front wheel 8 to rotate.
The connection between the generator 3 and the driving motor 4, the connection between the battery pack 9 and the generator 3, and the connection between the battery pack 9 and the driving motor 4 are realized through electric control modules.
The transmission housing 5 is integrally arranged in an automobile cabin after being connected with the engine 1, the reduction gear 2, the generator 3, the driving motor 4, the main reduction gear 11 and the differential mechanism 6 are integrated in the transmission housing 5, and the transmission housing 5 is integrally arranged in the automobile cabin after being connected with the engine 1, so that the integration level is high, the structure is compact, and the arrangement and industrialization are easy to realize.
The generator 3, the driving motor 4 and the differential mechanism 6 are arranged in the upper and lower space, the integration level and the space utilization rate are high, and the arrangement is easy.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (9)

1. A control method of a plug-in hybrid power system is characterized in that: the plug-in hybrid power system comprises an engine (1), a battery pack (9), an oil tank (10) and a driving transmission part, wherein the engine (1) is communicated with the oil tank (10), the driving transmission part comprises a transmission shell (5), a generator (3), a driving motor (4) and a differential (6), the generator (3) and the engine (1) are arranged in the transmission shell (5), the generator (3) is connected with the driving motor (4) in a non-coaxial mode through a pair of reduction gears (2), the generator (3) is connected with the driving motor (4), the driving motor (4) is connected with the differential (6) through a pair of main reduction gears (11), the differential (6) is connected with a front wheel (8) of an automobile through a driving shaft (7), and the battery pack (9) is respectively connected with the generator (3) and the driving motor (4);
the control method of the plug-in hybrid power system comprises the following steps
When the SOC value of the battery pack (9) is higher than a first threshold value, if the vehicle speed is lower than or equal to a second threshold value, the battery pack (9) provides power for the driving motor (4) and enters a pure electric mode; if the vehicle speed is higher than a second threshold value, the engine is started, the engine (1) transmits power to the generator (3), the generator (3) and the battery pack (9) provide power for the driving motor (4) together, and the hybrid mode is entered;
when the SOC value of a battery pack (9) is lower than or equal to a first threshold value, if the power generation amount of an engine (1) is smaller than the energy required by the driving of an automobile, the engine (1) transmits power to a generator (3), the generator (3) and the battery pack (9) jointly provide power for a driving motor (4), and a hybrid mode is entered; if the power generation amount of the engine (1) is larger than the energy required by the driving of the automobile, the engine (1) provides power to the generator (3), the generator (3) provides power for the driving motor (4), the engine mode is entered, and the engine (1) generates redundant power through the generator (3) to charge the battery pack (9);
when the front wheel (8) is in a braking state, the driving motor (4) converts braking mechanical energy into electric energy to charge the battery pack (9).
2. The control method of a plug-in hybrid system according to claim 1, characterized in that: the pure electric mode specifically comprises the following steps of,
the engine (1) does not work, the battery pack (9) transmits energy flow to the main reduction gear (11) and the differential mechanism (6) through the driving motor (4) in sequence, and the differential mechanism (6) drives the front wheels (8) to rotate through the driving shaft (7).
3. The control method of a plug-in hybrid system according to claim 1, characterized in that: the hybrid mode may specifically include a mode in which,
engine (1) and battery package (9) are driving motor (4) and provide power, engine (1) operation is passed through to some power of driving motor (4), and the energy flow passes through reduction gear (2), generator (3) to driving motor (4) in proper order, and another part power of driving motor (4) passes through battery package (9) and transmits the energy source to driving motor (4), and driving motor (4) transmit the energy that obtains for main reduction gear (11) and differential mechanism (6) in proper order, and differential mechanism (6) are with power through drive shaft (7) drive front wheel (8) rotation.
4. The control method of a plug-in hybrid system according to claim 1, characterized in that: the engine modes specifically include the modes of operation,
the engine (1) works, the battery pack (9) does not work, power is transmitted to the driving motor (4) from the engine (1) sequentially through the reduction gear (2) and the generator (3), and the driving motor (4) transmits the power to the driving shaft (7) sequentially through the main reduction gear (11) and the differential (6) to drive the front wheel (8) to rotate.
5. The control method of a plug-in hybrid system according to any one of claims 1 to 4, characterized in that: the output end a (12) of the crankshaft of the engine (1) is connected with one reduction gear (2), the input end a (13) of the generator (3) is connected with the other reduction gear (2), the pair of reduction gears (2) are meshed with each other to realize transmission, and when the engine (1) operates, power sequentially passes through the output end a (12) of the crankshaft and the input end a (13) of the generator (3) to the generator (3).
6. The control method of a plug-in hybrid system according to any one of claims 1 to 4, characterized in that: output b (14) and a main reduction gear (11) of driving motor (4) are connected, input b (15) and another main reduction gear (11) of differential mechanism (6) are connected, a pair of main reduction gear (11) intermeshing realizes the transmission, differential mechanism (6) are connected with car front wheel (8) through drive shaft (7), the power that driving motor (4) obtained loops through output b (14), main reduction gear (11), input b (15) to drive shaft (7) of differential mechanism (6) of driving motor (4), and final drive front wheel (8) rotate.
7. The control method of a plug-in hybrid system according to claims 1 to 4, characterized in that: the connection between the generator (3) and the driving motor (4), between the battery pack (9) and the generator (3) and between the battery pack (9) and the driving motor (4) is realized through an electric control module.
8. The control method of a plug-in hybrid system according to claim 1, characterized in that: the transmission shell (5) is integrally arranged in an automobile cabin after being connected with the engine (1).
9. The control method of a plug-in hybrid system according to claim 1, characterized in that: the generator (3), the driving motor (4) and the differential (6) are arranged in the upper and lower space.
CN202010319986.4A 2020-04-22 2020-04-22 Control method of plug-in hybrid power system Pending CN111391644A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113043860A (en) * 2021-02-22 2021-06-29 深圳光韵达光电科技股份有限公司 Range-extending type and engine direct-drive hybrid driving method and system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113043860A (en) * 2021-02-22 2021-06-29 深圳光韵达光电科技股份有限公司 Range-extending type and engine direct-drive hybrid driving method and system

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